Card Separation Technique

Hey everyone, today I stumbled upon this video of the Out of This World trick. The only thing I can think of for separating the cards before the effect would be using a cull. In this version, I'm not sure what move they're using or if it's a gaffed deck. You can see the move during the cut, but I can't figure out how the cards are separated. Does anyone know the name of the technique or what book I can find it in? It seems like a very clean way to perform this trick.

The video:

https://vm.tiktok.com/ZNd3sMLyV/

After thinking about it and watching the video, the only thing I can come up with is that it might be like a Svengali deck, but instead of the cards being short along their length, the cards of one color are shorter along their width.

Okay, I think I just stumbled upon the answer by chance on TikTok, and I'd say it's a stripper deck.